Sandpaper-machine.



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' PATBNTED MAR. 3, 1908. J. T. BRANTLEY.

SANDPAPER MACHINE.

APPLICATION FILD-DBG. 6. 1906.

2 SHEETS-SHEET` Z.

t afferma? JOHN T. BRANTLEY, OF SALISBURY, NORTH CAROLINA.

SANDPAPER-MACHINE Specification of Letters Patent.

Patented March 3, 1908.

Application filed December 6, 1906. Serial No., 346,659.

To all whom it may concern.'

Be it known that I, JOHN T. BRANTLEY, a citizen of the United States, residing at Salisbury, in the county of Rowan and State of North Carolina, have invented certain new and useful Improvements in Sandpaperl\4a chines, of which the following is a specification.

This invention appertains to wood-working machinery for finishing articles of furniture, being chiefly designed for sandpapering veneered furniture although adapted for furniture and building material generally.

1n its organization the' machine embodies an endless belt coated upon one side with an abrasive material, such as sand, emery or corundum, pulleys for supporting the said belt, formers for conforming the endless belt to the shape of the work, a work support and coperating means for driving the belt and reciprocating the work support.

For a full description of the invention and the merits thereof and also to acquire a knowledge of the details of construction of the means for effecting the result, reference is to be had tothe following description and accompanying drawings.

While the invention may be adapted to different forms and conditions by changes in the structure and minor details without departing from the spirit or essential features thereof, still the preferred embodiment is shown in the accompanying drawings, in which:

Figure 1 is a perspective view of the machine embodying the invention. Fig. 2 is a detail perspective view of the upper portion of the machine as seen from the reverse side of Fig. 1. Figs. 3 to 8 inclusive illustrate different shapes of formers. Fig. 9 is a detail view of a portion of the frame-work and work table showing the manner of mounting the latter to admit of its vertical movement. Fig. 10 is a detail view of a portion of an abrasive or working belt composed of a plurality of strips.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings by the same reference characters.

The machine embodies a suitable framework for supporting the working parts, said frame work comprising uprights 1, upper and lower longitudinal bars 2 and 3 and upper and lower transverse bars 4 and 5, the several frame members being substantially connected at their points of meeting or crossing. A countershaft 6 is located near .one end of the machine and is mounted in suitable bearings and is provided with a series of band pulleys 7, 8, 9 and 10 fast thereto so as to rotate therewith. stitutes' the driver and receives power from a suitable source by means of a drive belt 11. Horizontal pulleys 12 and 13 are located near opposite ends ofthe machine and support the working belt 14 which may consist of a single strip, or comprise a plurality of strips according to the especial work for which the belt is designed. The pulley 12 is fast to a vertical shaft 15 whereas the pulley 13 is adjustable to admit of bearing the tension upon the endless belt 14 to meet the requirements of the work in hand. The pulley 13 is adjusted by. means of set screws 16 which likewise serve to hold the same in an adjusted position. The shaft 15 is provided near its lower end with a pulley 17 which is connected by a drive belt 18 with the pulley 9.

The endless belt 14 may be of textile such as canvas, or may consist of leather and may be of any width or length and is coated upon one side with a suitable abrasive material such as sand, emery or the like. The belt is arranged to operate in a horizontal plane although its runs occupy a vertical position.

A second endless belt 19 is located in the rear of the working belt 14 and is mounted upon pulleys 2O and 21 which are fast to shafts 22 and 23 located near opposite ends of the machine and arranged horizontally. Motion is imparted to one of the shafts for driving the endless belt 19 and as indicated, a drive belt 24 connects the pulley 10 of drive shaft 6 with a band pulley 25 fast to the shaft 23. The runs of the belt 19 have a horizontal arrangement. The work to be finished is fed laterally to the belt 14 and vertically to the belt 19.

The support 26 for receiving the work is mounted in suitable guides and is adapted to have a reciprocating movement imparted thereto so as to automatically jig the work during the sandpapering or finishing operation. A pitman 27 connects the work support 26 with a crank wheel 28 fast to a shaft 29, said shaft being provided with a pulley 30 which is connected by means of a drive pulley 31 with the pulley 8.

The pitman 27 is eXtensible to admitv of varying the elevation ofthe support 26 according to the size of the work.

The band pulley 7 con- A plurality of formers 22 are provided for cooperation with the sandpapering or work belts 14 and 19 to cause the same to conform to the shape of the work to be sandpapered, or finished. The formers 32 may be concave, convex, angular, plain, or curvilinear in order to meet the various requirements. The formers are suitably supported in the rear of the run of the sandpapering belt against which the work is placed, the proper former being selected according to the particular work in hand.

In the operation of the machine, power is imparted to the drive shaft 6 from a suitable engine or source of power in any convenient way as by means of the drive belt ll, the several shafts connectedwith the drive shaft in the manner herein stated, receiving power therefrom. The sandpapering belts are driven and the work support reciprocated and the article or work placed upon the support 26 is advanced to the selected sandpapering belt and finished thereby in the manner well understood.

Having thus described the invention, what is claimed as new is:

l. In a sand paper machine of the character specified, the combination of a horizontally arranged endless belt for finishing the work, a work support, and means for imparting a vertical reciprocating movement to the work support.

2. In a machine of the character specified, the combination of a fieXible sand papering strip, spaced supports therefor, a work holder arranged beneath the supports of the sand papering strip, means for imparting a reciprocating movement to the work holder at about aright angle to the sand papering strip,

and means for varying the amplitude of movement of the said work holder.

3. In a machine of the character specified', the combination of a sand papering belt, a work support, means for imparting a reciprocating movement to the work support at about a right angle to the said sand papering belt, and a former for shaping the belt to the work and attached to the said work support.

In testimony whereof I aflix my signature in presence of two witnesses.

JOHN T. BRANTLEY.

Witnesses:

JoHN J. STEWART, JOHN L. RENDLEMAN. 

